You are the MegaCorp Security Administrator. This company uses a firewall cluster,
consisting of two cluster members. The cluster generally works well but one day you find
that the cluster is behaving strangely. You assume that there is a connectivity problem with
the cluster synchronization link (cross-over cable). Which of the following commands is the
BEST for testing the connectivity of the crossover cable?

A.
ifconfig -a

B.
arping <IP address of the synchronization interface on the other cluster member>

C.
telnet <IP address of the synchronization interface on the other cluster member>

D.
ping <IP address of the synchronization interface on the other cluster member>